Ultrafast optical generation of antiferromagnetic texture-antitexture pair

ORAL

Abstract

In this presentation we demonstrate the generation of an antiferromagnetic texture-antitexture pair with the help of an ultrafast laser [1]. We adopt a hybrid quantum-classical evolution scheme which consider both electronic and magnetic system on equal footing and reveals their intertwined dynamics [2]. By analysing the different stages of the dynamics we systematically identify the emergence of topological order in real time. The process does not require any intrinsic spin-orbit coupling or external magnetic field and conserves total topological charge. The texture can survive for 100ps and is fairly robust against scalar impurity.

[1] S. Ghosh, S. Blu¨gel and Y. Mokrousov. arXiv:2205.12100. http://arxiv.org/abs/2205.12100

[2] S. Ghosh, et.al. Comm. Phys., 5(1), 69, 2022.[arXiv:2011.01670] https://www.nature.com/articles/s42005-022-00840-3

*We acknowledge financial support from Leibniz Collaborative Excellence project OptiSPIN − Optical Control of Nanoscale Spin Textures. We acknowledge funding under SPP 2137 "Skyrmionics" of the DFG and financial support from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (Grant No. 856538, project "3D MAGiC"). The work was also supported also by the Deutsche Forschungsgemeinschaft (DFG, German Re- search Foundation) − TRR 173/2 − 268565370 (project A11), TRR 288 − 422213477 (project B06).

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Publication: [1] S. Ghosh, S. Blu¨gel and Y. Mokrousov. arXiv:2205.12100. http://arxiv.org/abs/2205.12100
[2] S. Ghosh, et.al. Comm. Phys., 5(1), 69, 2022.[arXiv:2011.01670] https://www.nature.com/articles/s42005-022-00840-3

Presenters

  • Sumit Ghosh

    • Forschungszentrum Jülich GmbH

Authors

  • Sumit Ghosh

    • Forschungszentrum Jülich GmbH

  • Stefan Blügel

    • Forschungszentrum Jülich GmbH
    • Forschungszentrum Jülich
    • Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany
    • Forschungszentrum Jülich GmBH

  • Yuriy Mokrousov

    • FZ Juelich, Germany